Uploading photo Spring - Ajax - ajax

Question

I am trying to upload a photo and get a preview of the uploaded image using Spring and Ajax.
I have the following code:
<h3>File Upload</h3>
<ul>
<li>
<form id="upload-form" method="post" enctype="multipart/form-data">
Select a file: <input type="file" name="uploadfile" size="45" accept="*" />
<br>
<input id="submit-button" type="submit" value="Upload" />
</form>
</li>
<li><p>Result: <br><span id="result"></span></p></li>
</ul>
<h3>Show Image</h3>
<ui>
<li>original:<img id="image-o" src="#" alt="original image" /></li>
<li>small: <img id="image-s" src="#" alt="small image" /></li>
<li>medium: <img id="image-m" src="#" alt="medium image" /></li>
<li>large: <img id="image-l" src="#" alt="large image" /></li>
<li>extra large: <img id="image-xl" src="#" alt="extra large image" /></li>
</ui>
<script type="text/javascript">
$(document).ready(function () {
$("#submit-button").on("click", function (event) {
event.preventDefault();
// create an FormData object
var data = new FormData($('#upload-form')[0]);
// disabled the submit button
$("#submit-button").prop("disabled", true);
// post data
$.ajax({
type: "POST",
enctype: 'multipart/form-data',
url: "image/api/upload",
data: data,
processData: false,
contentType: false,
cache: false,
timeout: 600000,
success: function (data) {
// shows server's response
// $("#result").text(data);
console.log("SUCCESS: ", data);
enableSubmitButton();
updateImages(data);
},
error: function (e) {
// shows server's response
// $("#result").text(e.responseText);
console.log("ERROR: ", e);
enableSubmitButton();
updateImages(e.responseText);
}
});
});
});
function enableSubmitButton() {
$("#submit-button").prop("disabled", false);
}
function updateImages(data) {
var url = 'http://localhost:9001/image/api/' + data;
$('#image-s').attr('src',url + '?size=s');
$('#image-m').attr('src',url + '?size=m');
$('#image-l').attr('src',url + '?size=l');
$('#image-xl').attr('src',url + '?size=xl');
$('#image-o').attr('src',url + '?size=o');
}
</script>
And my Java code:
#POST
#Path("/upload")
#Consumes(ExtendedMediaType.MULTIPART_FORM_DATA)
#Produces(ExtendedMediaType.APPLICATION_JSON_UTF8)
#Transactional
public ResponseEntity<Void> uploadImage(#RequestParam("uploadfile") MultipartFile file) {
if (file.getSize() < maxFileSize && validExtensions.contains(file.getContentType())) {
Image image = Image.builder().id(file.getSize()).build();
imageServiceConfigMapper.saveImage(image);
/* FormDataContentDisposition fileDetail = null;
ImageMetadata imageMetadata = buildImageMetadata(fileDetail, image);
imageServiceConfigMapper.saveMetadata(imageMetadata);*/
}
return new ResponseEntity<>(HttpStatus.OK);
When I choose a photo from my PC, it is accepted - see screenshot below:
When I click in upload, my browser gives the following answer:
The JSON looks like this:
BUT the selected picture is not showing:
Am I using a wrong URL?
The address of the site where I got the above screen ends is the one with index.html at the end, but I defined /api/upload as a relative path...
If I open the relative path, I got the following:
Or is it something wrong with the code responsible for the preview?
Sorry, I know there is a tones of similar issues but I could not found anything that hepled. I am quite a beginner...
Sorry for the long post and thanks for the help in advance!

Answer 1

Spring Content can do this and has a getting started guide and git repo with an angularjs based front-end that demonstrates exactly what you are trying to do. The getting started guide is here.